Arduino Pro Micro Eagle Library -

Creating a custom Eagle library (.lbr) file for the Arduino Pro Micro can be done in two ways: creating the file manually using the XML code below, or following the design steps to build it from scratch in the Eagle editor.

: Many community libraries mistakenly place board outlines on Layer 20 (Dimension). For custom PCB designs, these should often be moved to Layer 51 (tDocu) to avoid DRC (Design Rule Check) errors. Arduino Forum 3. How to Install the Library in EAGLE arduino pro micro eagle library

Real-World Project Example

Imagine building a custom 8-key macro pad. With the Pro Micro Eagle library: Creating a custom Eagle library (

1. In the Library window, click the Device button.
2. Create a new device named ARDUINO_PRO_MICRO.
3. Click Add (bottom left) and select the Symbol you created (ARDUINO_PRO_MICRO). Place it in the workspace.
4. Click New (bottom right) and select the Package you created (ARDUINO_PRO_MICRO).
5. Connect the Pins:

   Integrated Footprint & Schematic: Instead of drawing 24 individual pins, the library provides a unified symbol and footprint specifically sized for the Pro Micro's 0.1" pitch headers. In the Library window, click the Device button

   Package (Footprint): The physical layout of the pads on the PCB. This ensures that when you order your board, the holes for the Pro Micro headers are spaced exactly mm) apart.